The use rate of coffee machines in daily life is very high. In the process of use, it can be found that the coffee machine has a liquid level detection function. When water is scarce, it will be reminded to add water or automatically replenish water. So how does this feature work? Generally used in coffee machines, need to meet the food grade. Non-contact liquid level sensor is generally used, because the separate liquid level sensor does not contact the liquid detection, more hygienic, and meets the needs of the water tank can be moved (and can measure whether the water tank is in place). Non-contact liquid level sensor, the principle is the principle of capacitance, and convenient installation, high precision, high reliability. All the components inside of the non-contact level sensor are treated with resin pouring, and there are no mechanical moving parts inside the sensor, so the sensor has high reliability and long life. And the floating ball liquid level sensor, mechanical operation, because of its principle, easy to hide scale, and not easy to clean, easy to appear stuck phenomenon, misjudgment. Although the float ball switch is cheap, it has low reliability and maintenance trouble. And used in the coffee machine is not hygienic, not easy to clean.
